button{
    width: auto;
    height: 50px;
    padding: 2px;
    margin: 20px;
    border: 5px aqua;
    background-color: yellow;
    color: red;
    font-size: 20px;
    font-style: normal;
    font-family: 微软雅黑 Verdana Arial sans-serif;
    align-content: normal;
}